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With the ongoing enhancement of ride comfort standards, variable damping coefficient dampers are increasingly utilized in automobile suspensions. Among these, magnetorheological dampers (MRD) and continuous damping control dampers (CDC) are the most commonly used. MRD adjusts the damping coefficient by altering the magnetic field intensity, while CDC adjusts it by altering the flow channel size. However, due to the inherent delay of tens to hundreds of milliseconds in their damping coefficient adjustment, their effectiveness in suppressing high-frequency vibrations, particularly impacts, is limited. This paper introduces a novel displacement-sensitive MR damper (NDS-MRD). This damper controls its damping coefficient based on the position of the piston and the current amplitude. It offers a zero-delay adjustment of the damping coeffic.0ient, ensuring a substantial range of adjustable damping coefficients. Furthermore, the MTS force-displacement test and quarter-car model simulations confirm the distinct advantages of the NDS-MRD over conventional MR Damper and passive damper in terms of isolation from high-frequency vibrations and impact resistance.

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Development of a Novel Displacement-Sensitive Magnetorheological Damper for Vehicle Suspension with High-Speed Stability and Impact Resistance

  • 会议论文

  • 发表日期：

    2025年

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  • Zhu Tao,
  • Ning Gong,
  • Liyan Pan,
  • Xiaotao Yu,
  • Jian Yang,
  • Shuaishuai Sun

摘要

With the ongoing enhancement of ride comfort standards, variable damping coefficient dampers are increasingly utilized in automobile suspensions. Among these, magnetorheological dampers (MRD) and continuous damping control dampers (CDC) are the most commonly used. MRD adjusts the damping coefficient by altering the magnetic field intensity, while CDC adjusts it by altering the flow channel size. However, due to the inherent delay of tens to hundreds of milliseconds in their damping coefficient adjustment, their effectiveness in suppressing high-frequency vibrations, particularly impacts, is limited. This paper introduces a novel displacement-sensitive MR damper (NDS-MRD). This damper controls its damping coefficient based on the position of the piston and the current amplitude. It offers a zero-delay adjustment of the damping coeffic.0ient, ensuring a substantial range of adjustable damping coefficients. Furthermore, the MTS force-displacement test and quarter-car model simulations confirm the distinct advantages of the NDS-MRD over conventional MR Damper and passive damper in terms of isolation from high-frequency vibrations and impact resistance.